Ship-propelling device



A. F. ANDERSON July 21, 1925. 1,547,008

SHIP PROPELLING DEVICE Filed Jan. 16, 1925 INVENTOR.

Fl; F. HNDER'SDN ATTORNEYS Patented July 21 19.25.

UNITED STATES- isr nes PATENT OFFICE.

ALBERT FRANCIS ANDERSON; 035 SAN FRAITGISGG, CALIFORNIA.

sHir-rnorELmiie DEVICE.

Application filed January T 0 aZZwhom may concern:

Be it known thatI, ALBERT RANGES Arr- DERSON, a cit zen of the UnitedStates, resid ing at San Francisco, in the county of San the ship towhich the device-is attached.

Another object is to produce a device of this character which may beattached to the ship without altering the construction of the same.

A further object is to produce a device wherein the high speed of theturbine or like propelling device may be employed without the necessityof reducing gears.

A still further object is to provide a device of this character whereinthe propulsive effort may be reversed without reversing the direction ofrotation ofthe engine, or in any manner decreasing the speed of theengine.

, Other objects and advantages will be apparent during the course of thefollowing description.

Inthe accompanying drawings forming a part of this specification and inwhich like 'numerals are employed to designate like parts throughout thesame,

Figure I is a fragmentary view showing the stern of a ship having mydevice attached thereto,

Figure II is a view similar to Figure 1 showing a modified form. of mydevice as applied to atowing vessel, and

Figure III is a diagrammatic rear view showing the positioning of thevarious nozzles.

Applicant is aware of the fact that jet propulsion of ships has beenemployed wherein the propeller was positioned within a tube extendingthrough the ship, resulting in severe losses due to skin friction and atthe same time necessitating the re-construction of portions of the ship.

This difiiculty has been entirely overcome by employing a casting 5secured to the stern of the ship, which casting may be of any convenientform and serves to position the and 13.

1c, 1925. Serial No. 21930.

lower end of the rudder as shown at 6, and

further serves to position the housing 7 within which a rotor 8 isadapted to revolve. This housing is provided with a bell shape'd portion9, chamberll and passageways 12 A rotor Si's positioned "within thechamberll and has veins 14; adapted to discharge into either of thepassage-ways 12 or 13, as will be later described. i

A bearing 16 serves to position the end of the propeller shaft 17, whichpropeller shaft extends into the ship andis connected to the drivingmechanism in any approved manner. By viewing Figure II it will be notedthat I have provided a casting 18 having a plurality of nozzles 19within which casting is positioned a rotor 21 mounted upon a shaft 22,which shaft is journaled as at 23 and has its opposite end extendinginto the ship where it is connected to suitable driving mechanism; Therotor 21 is adapted to take in fluid through the channels 23 and 24 soas to discharge through the nozzles 19.

At 26, I have shown a vane which is adapted to be attached as at 27,which vane may be moved from its full line po sition to the dotted lineposition. This form of device is adapted to be employed in towing wherethe movement of the ship is comparatively slow and therefore a suitableweight does not have to be figured with.

By viewing Figure III, it will be noted that I have diagrammaticallyillustrated a series of nozzles, which figure may be considered asapplying to either of the forms shown in Figures I and II.

'The operation of my device is as follows Referring to Figure I andassuming that the parts are in the position shown in this figure,rotation of the shaft 17 will cause fluid to be thrown from the blades14 outwardly, which fluid will encounter the passage-ways 12, thusdirecting a. stream of water rearwardly. As this water is thrown out,more water will enter through the bellshaped member 9 with the resultthat considerable propulsive force will be gained by this device. Whenit is desired to re verse the direction of the ship, the shaft 17 ismoved to the right of the drawing with the result that the stream isthrown from the blades 14 into the passage-ways 13, thus directing theflow toward the forward part of the ship, or in a reverse direction fromthat previously discharged, and thus effecting a quick stopping of theboat, and a reversing of the movement if desired.

In the form shown in Figure II reversing of the ship may be accomplishedin any convenient manner, as by employing auxiliary propellers orseparate vanes adapted to reverse the direction of discharge from thenozzles 19. In this device it is particularly adapted for dischargingWater into a relatively quiet medium, and therefore it is designed tohandle the condition of this character.

It is to be understood that the form of my invention, herewith shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes in the shape, size and arrangement of parts may beresorted to Without departing from the Ways formed in said casting andadapted to discharge fluid from said impeller when said impeller ismoved longitudinally.

I11 testimony whereof I afliX my signature. ALBERT FRANCIS ANDERSON.

